Wietse Venema:
> Summary: the Postfix SMTP server crashes with signal 11 on FreeBSD
> 10.1-RELEASE when some library (below, the MySQL client) links zlib
> at build time, and OpenSSL from ports tries to load zlib lazily at
> runtime (zlib-dynamic is enabled by default).
>
> To reproduce: see the thread "Postfix / OpenSSL signal 11 on delivery
> from ebay" on the postfix-users mailing list.
>
> The following matrix summarizes different Postfix and OpenSSL build
> options, and their effect on this crash.
>
> smtpd Postfix ------OpenSSL------
> crash mysql+zlib zlib zlib-dynamic
> ============================================================
> y y y y
> n y y n <- see patch below
> n y n n <- workaround (safe)
> n n y y <- workaround (bad)
>
> Conclusion: building OpenSSL with zlib and no-zlib-dynamic may solve
> the problem without losing the benefits of zlib compression.
Ignore the patch. The crashes are the result of a name conflict
with the non-system zlib implementation that is bundled with MySQL.
The fix is to build mysql with the system zlib implementation.
Wietse
